remove reference to router option in docs

Author: benmccann

documentation/docs/11-page-options.md

@@ -16,7 +16,7 @@ Ordinarily, SvelteKit [hydrates](#appendix-hydration) your server-rendered HTML
 </script>
 ```
 
-> If `hydrate` and `router` are both `false`, SvelteKit will not add any JavaScript to the page at all. If [server-side rendering](#hooks-handle) is disabled in `handle`, `hydrate` must be `true` or no content will be rendered.
+> If `hydrate` is `false`, SvelteKit will not add any JavaScript to the page at all. If [server-side rendering](#hooks-handle) is disabled in `handle`, `hydrate` must be `true` or no content will be rendered.
 
 ### prerender